Brain Out Level 94
📝 Walkthrough
Overview
The prompt asks you to form the smallest possible number. Four blank slots run across the upper board, and a set of numbered buttons sits below them. On a normal number pad, the smallest four-digit number would be built by arranging the available digits in ascending order, but this level hides a minus sign behind the first slot line. Pulling that line upward reveals a negative sign, after which a three-digit number with a minus in front becomes far smaller than any positive number you could build. The intended result is negative nine hundred ninety-nine.
- Difficulty: Regular
- Estimated moves: 2
Step-by-Step Solution
- Read the prompt "Form a smallest possible number" and look at the four empty slots above the digit buttons. The leftmost slot line looks like an ordinary underline at first.
- Press and hold that leftmost line, then drag it upward. A minus sign slides out from behind the line, turning the first position into a negative sign rather than a digit slot.
- Confirm the minus sign stays visible at the front of the entry row. With a negative sign available, the smallest number is the most negative value you can enter, so you want the largest positive three-digit number after the minus.
- Enter 999 in the remaining three slots using the number buttons. The buttons let you build the three-digit value nine hundred ninety-nine next to the minus.
- Read the completed entry as -999. A negative number this large in absolute value is smaller than every positive number on the board.
- Submit the entry. The level accepts -999 as the smallest possible number and shows the success panel.
Strategy & Reasoning
The puzzle separates "smallest" from "smallest positive." Many players rearrange the visible digits into an ascending sequence to make the lowest four-digit number, but that ignores the hidden minus sign behind the first line. Once the sign is revealed, the comparison flips: a negative number is always below any positive one, so the biggest three-digit value attached to the minus gives the smallest overall result.
Dragging the first line up is the setup move that most guides miss. Without it, the board behaves like a standard digit-placement puzzle, and every positive arrangement you try will be rejected as too large. The available digits do not need to spell a plausible real-world figure; the level checks for the negative nine hundred ninety-nine construction, and confirming the minus is visible before entering the digits prevents a mistaken positive entry.
Tips & Common Mistakes
- Do not arrange the buttons into the smallest positive four-digit number; the hidden minus sign means a negative value is expected.
- Pull the leftmost slot line upward first to expose the minus before you tap any digit.
- After the sign appears, enter 999 so the result reads -999; if the entry still shows a positive number, the minus was not revealed correctly.